A federal jury convicted three ambulance company employees, including two from the San Fernando Valley, of participating in a $2.4 million Medicare fraud scheme, authorities announced Wednesday.

Their guilty verdict came after a 10-day trial in federal court in Los Angeles, according to the United States Department of Justice.

Yaroslav “Steven” Proshak, 47, of Valley Village; Emilia Zverev, 58, of Van Nuys and Sharetta Michelle Wallace, 37, of Inglewood were convicted of one count of conspiracy to commit health care fraud and five counts of health care fraud.

Proshak owned and operated ProMed Medical Transportation, a Gardena-based ambulance company that, provided non-emergency services to Medicare beneficiaries, many of whom were dialysis patients, the U.S. Attorney’s Office for the Central District of California reported.

The evidence during the trial before District Judge S. James Otero revealed that, between May 2008 and October 2010, the three conspired to bill Medicare for ambulance transportation services for individuals they knew did not need, the government said.

The evidence also showed that the defendants instructed EMTs who worked at ProMed to conceal the true medical conditions of patients they were transporting by altering paperwork and creating fraudulent documents to justify the services, according to the U.S. Attorney’s Office

Jurors heard that ProMed submitted at least $2.4 million in false and fraudulent claims to Medicare and that it paid out $1.2 million of those claims.

The attorneys for Proshak and Zverev could not be reached for comment.

Wallace’s lawyer, Richard W Raynor of Redondo Beach, said the government’s case in part focused on five patients who it claimed didn’t need medical transportation.

But during the trial a doctor testified that three of the five needed the ambulance service, he said. And by the time of the trial three of them had died and the other two were too sick to testify.

“The verdict was very disappointing,” Raynor said.

The three are scheduled to be sentenced by Otero in November. They could face a maximum sentence of 60 years in federal prison.